Update dependency express-prom-bundle to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
express-prom-bundle	^6.6.0 -> ^7.0.0

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Release Notes

jochen-schweizer/express-prom-bundle (express-prom-bundle)

v7.0.0

Compare Source

• bumped peer dependency prom-client to v15 (thanks to @​steve1337)
• respect pruneAgedBuckets option for Summary (thanks to @​timm-stelzer-e-farm)
• respect collectDefaultMetrics.prefix option for up metric (thanks to @​gandazgul)
• use status code 499 for requests that are closed before response is sent (thanks to @​petuomin)
• README now has an example of normalizePath() that simply uses the route instead of guessing what looks like a variable part. Yet it doesn't seem to work with subrouters (thanks to @​Cellaryllis)
• switched type-checking tool from dtslint to tsd

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